Between 1981-1989, David was a Managing Director of Samuel Montagu, Midland Montagu and Midland Global Corporate Banking (now HSBC). David was also a Managing Director of CSFB and its predecessor companies (1969-1981). David is currently a non executive director of Fundsmith Emerging Equities Trust, Chairman of Illustrated London News and a member of the Advisory Board of ALVA Capital.. He is a Council member of The Centre for the Study of Financial Innovation, Chairman of the National Film and TV Foundation, The Bryanston Foundation and a Trustee of Step Together Volunteering.. He is a member of the Investment Committee of King’s College London where he is a Fellow.
Appointed to the Board of Spark Ventures on 20 March 2002, and Chairman from 25 September 2009. He assumed the Chairmanship of the renamed Gresham House Strategic in August 2015